Warp stop-motion for looms.



PATENTED APR. 23, 1907.

E. BARNES. WARP STOP MOTION FOR LOOMS.

APPLIOATIOI-T FILED NOV. 14, 1906.

UNITED STATES PATENT orrrcs.

EDWIN BARNES, OF BOSTON, MASSr-XOHUSETTS, ASSIGNOR TO WILLIAM FIRTH, OF BROOKLIXE, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed November 14,1906. Serial No. 343,371.

1'0 a/ZZ who'll-z) it 'may concern.-

Beit known that I, EDWIN BARNES, of Boston, in the countyof Suffolk and State of Massachusetts, have invented certain new and useful Improvements in \Varp Stop- Motions for Looms; and I hereby declare that the following is a full, clear, and exact 'de scription of the same, reference being had to the accompanying drawings, forming part of I v operating mechanism will stop the loom.

One object of the invention is to so construct a detector drop, that, in its movement from the normal position, in which it is supported by a warp thread, said device Wlll :move out of registration with the bank of -dro devices to a position where it forms a visi le s1gna1,or sentinel, to d esign ate the location of the particular thread which is broken.

construct a warp detector of this nature} Another object of the invention is to so that the electric terminals, or supports, will not interfere with the rise or fall of the warp threads, and that the detector drops or devic'es will not Wear on the warp thread during such rise and fall.

Another object of the invention is to im prove the construction of warp stop motions of this nature with respect to the location of the electric terminals and guide bars for the drop devices. v Another object of the invention is to secure a wiping or cutting contact, between the dro devices and the electric terminals.

Anot er object of the invention is to improve the construction of the'drop devices or wires so called.

The invention consists in the peculiar construction of the drop device adapted for use as a circuit closer or as a visible detector.

The invention also consists in the peculiar arrangement of the electric terminals, and the combination therewith of suitable circuit closers.

The invention also consists in such other novel features of construction, and combination of parts, as shall hereafter be more fully described and pointed out in the claims.

in tin drawings: Figure 1, represents an end viewof the improved warp stop motion shown apart from the loom, the warp threads, and the lease rods being shown in relation to this device. Fig. 2, represents a view cl portions of the same, the end brackets being removed to more clearly show the operation of the drops.

Similar numbers of reference designate corresponding parts throughout.

As shown in the drawings, in its preferred form, a pair of brackets similar to that shown in Fig. 1, are designed. to be mounted at the sides of the loom and are adapted to support the terminals of an electric circuit as well as the guide rods. These brackets have lower members, as 5, intermediate members, as 5, and upper members, as 7; in the lower member 5, is formed the bearing 8 adapted to be received on some suitable part of the loom; above and below the member 6, are formed, at the sides of the bracket, concave seats 9*) and 1010, and in the upper member 7, are slotted bearings, as 11. In the seats 9 and 1010 are located respectively the electric terminals 1212, insulated from said seats, and the guide rods 18-13, which extend across the loom as in similar structures of this nature and are secured in place by means of the clamp plates 1%44, insulated from the terminals 12- 12, and the bolt 15 extending through the perforations in the clamp plates and through the member 6. In the slotted bearing 11 is removably supported the terminal 16, which is insulated from said bearing 11 and is electricallyconnected with one arm of the electric circuit ccy the other arm of which is electrically connected with the terminals 12l2, this electric circuit :cz includes a battery I), or other source of electric energy, and the coils oi a magnet, a, of the stopping actuating mechanism.

Slidably mounted on each of the terminals 2, and its related guide rod 13 is a series of gravity drops 17,.formed of thin sheet metal and having straight slots 18, open at their lower ends and slightly wider than the diameter of the terminals LIB- 12, the upper end of said slot 18 curves outward at the upper vslot 18 and overhalances the drop device at its inner edge.

In setting up a wairp on a loom provided with thiswarp stop motion the terminal 16 is, preferahly, removed from its hearings and the warp threads w ll) pla;ed in'position,

extending between the tern1inals-1212 and the level of the hearing 11, the terminal 16 is now replaced, andthe threads to w of the warp are crossed, as shown in the drawings h the use of the ordinary lease rods 1-1. On each of the warp threads w w is now engaged one of the drop devices 1717, the number of these devices depending on the number of warp threads, and the threads passing through the thread eyes 20-20;

.l Vhile thewarp threads w w remain on broken, and are not unduly loosened, the drop devices 17 17 are supported as shown in full lines in the drawings; with the normal rise and fall of the warp, the straightportions of the slots lS'of the drops, slide upward and downward on the rods 12' and 13, the outer edges 18 ofthe slots 18 hearing against the terminals 1212 as shown in Fig. 2, hut no swinging action of the drops 17 is permitted and, owing to the contracted opening 20, the warp threads do not readily become disengaged from the thread eyes.

When one of the warp threads w breaks the drop device 17, normally sustained therelry, slides downward on its terminal 12 and rod 13 until the curved edge 19 of the curvederg tension 19 is carried below the terminal 12 and the upper portion or the detector 18 iree to swing inward, towards the terminal 1 6,

, under theoverhalancing of theconta t arm 22, the curve 190i the slot 18 atlording clear ance for the terminal 12, until the arm 22 contacts with the terminal 16, and the edge '19 of the curved extension slot 19 contacts tender, and acts to indicate the location ofv the broken thread. When the broken thread is repaired, nothreading of the drop device 17 is necessary, as such device readily moves down into place when the arms of the lower end are brought astride of the'thread and of the bars 12 and 13, the curving edges of the upper end 190i the slot acting to guide the thread to and through the opening 20.

WVhen desired, as when coarse warp threads are used, a single bank only of the drop dethe drawing, the curved extension 19 of the.

slot 18, is extended beyond the point at 'whizh (ontaot is madewith the terminal 12,,

when the drop 17 is in a position as a circuit closer het'ween said terminal and the terminal 16 this clearance permits the inward swing of the drop device to accommodate itself to any small irregularity in the loeatioirof the t rminal 16 and, as a fa -3t, theterminal 12 should never contact with the upp r end of the turved extension 19, as ,such contact, com'lined with the resistance of the rod 13, in the slot 18, would'limit the swing of the arm 22 towards the' exterior terminal 16.

Having thus described my invention I claim as new and desire to secure by Letters Patent. I

1, A gravity drop "for warp stop mot-ions, formed of sheet metal and having a longitudinal slotcurved at its upper end, and having a thread eye oonnnnnicating with the upper curved end of said slot, said thread eyebeing located at one side of the median line of the straight portion of said slot.

2. A gravity drop for warp stop motions, formed of sheet metal and having a longitudinal slot furnished at its upper end with a lateral clearance extensioinand a thread eye located. at one side of the median line of the straight port on ot said slot.

3. A. gravity drop for warp stop motions formed of sheet metal, and having a longitudinal slot hirnishedwith a clearance exten- 'sion, eitending laterally beyond the median line of the straight portion of said slot, a thread eye above said clearance extension and a counter weight located at the other" side of said median line.

4. A gravity dropiorwarp stop motions, formed of sheet metal and having a longitudinalslot, a thread eye above said slot, and a counter weight arm located laterally out of dinal slot furnished'at its upper end with a curved clearance extension, a thread eye .ICC

LII

above the end of said slot extension, and a detector arm oil? set from the line of said slot.

7. In a warp stop motion the combination with a pair o'lguide arms, in approximate vertical alignment, one of whichis the terminal of an electric circuit, and a second terminal above said guides and offset laterally therefrom, of a gravity drop having a longitudinal slot slidably engaged by said guide rods, a clearance opening extending laterally from said slot at one side, and a contact arm extending above said slot.

8. In a warp stop motion, thecombination with an electric terminal and a guide below the path of the warp, and a second terminal above said path, of a counter weighted gravity drop slidably engaged with said first ter' minal and guide, and constructed to move inward under abnormal downward movement towards the second terminal.

9. In a warp stop motion the combination with an electric terminal and a guide, means for supporting the same below the path of the warp and a second electric terminal removably secured above said path, of a gravity drop having a longitudinal slot, slidably engaged by said first-mentioned terminal and guide, and having a laterally-extending clearance for said guide terminal, and a contact arm extending aboveisaid slot.

10. In a warp stop motion, the combination with an electric terminal and a guide,

means for supporting the same in approximate vertical alignment, and a secondelectric terminal .mounted above said first mentioned terminal and off set therefrom, of a gravity drop having a longitudinal slot, slidable onthe first terminal and guide, and furnished with a laterally curved clearance extension, and a thread eye above said extension, and a detector contact arm, extending upward fromthe body of said drop at one side of the longitudinal'slot, as and for the purpose described.

11. In a warp stop motion the combination with a pair of guide rods, means for supporting the same below the path of the warp, and an electric terminal removably supported at a distance above the path of ,the warp and out of contact with the warp, and circuit closers movably mounted on said guide rods.

12. Ina warp stop motion, the combination with means for crossing the warp threads, of an electric terminal, means for supporting said terminal above the crossed warp threads, guiding means including an electrical terminal located below the warp threads, and-a series of gravity drops slidably engaged with said guiding means, and having means cooperating with said guiding means to direct the upper portion of said drop laterally towards the upper electric iei minal as the drop moves downward.

13. In a warp stop motion, the combina tion with means for crossing the warp threads, an electric terminal, and means for supporting the same above the intersection of the warp threads, of gravity drops adapted to be normally supported by unbroken warp threads at a distance from their point ot intersection, and means cooperating with said drops to direct the drops towards said electric terminal when said drops move downward.

14. In a warp stop motion, the combination with the terminals of an electric circuit, separated laterally, of a grav ty drop having means for engaging a warp thread and sl dable with respect to one of said terminals with the normal rise and fall of the warp, and having means cooperating with said terminal to ell'ect the lateral movement of aportion of said drop towards the other of said terminals.

15. In a warp stop motion, the combination with an electric terminal, of a circuit closing gravity drop, having thread engaging means located at one side the longitudinal median line thereof, whereby said drop 18- overbalanced towards said terminal when the drop is supported on an unbroken warp thread, and means cooperating with said drop to limit the movement of the drop towards said terminal while the drop is supported by a warp thread and to permit said movement when the warp thread breaks or becomes unduly slack.

16. In a warp-stop motion, the combina' tion with a guide, of a vertically slidable gravity drop furnished with a longitudinal slot having a curved extension adapted to receive said guide.

, 17. In a warp stop motion, the combination with a guide, of a gravity drop slidably engaged with said guide, and having an opening extending laterally with respect to said guide whereby when the drop slides downward suflieiently, the guide may be received in said opening to permit the swinging of the drop.

In testimony whereof I affix my signature in presence of witnesses.

EDWIN BARNES.

Witnesses:

GEORGE I'IUTGHIXSON, W. 1*. Fromm), W. H. Mansn. 

